Here are the steps to reproduce 

./cc1 --version
GNU C version 3.4-llvm 20030924 (experimental) (i686-pc-linux-gnu)

Extract the .i from the reload
llvm/llvm-gcc/gcc$ make reload.o  -W reload.c CFLAGS=-save-temps

./cc1 reload.i
 gen_sse_prologue_save
Segmentation fault

Created an attachment (id=184) [details]
reload from the gcc

This causes the crash

I'll take a look.

Thanks!

-Chris

here's a reduced testcase:

typedef struct {
  unsigned min_align: 8;
  unsigned base_after_vec: 1;
  unsigned min_after_vec: 1;
  unsigned max_after_vec: 1;
  unsigned min_after_base: 1;
  unsigned max_after_base: 1;
  unsigned offset_unsigned: 1;
  unsigned : 2;
  unsigned scale : 8;
} addr_diff_vec_flags;

addr_diff_vec_flags X;

here's a more reduced testcase:

typedef struct {
  unsigned min_align: 1;
  unsigned : 1;
} addr_diff_vec_flags;

addr_diff_vec_flags X;

Fixed.  Patch here:
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20041122/021264.html

Testcase here:
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20041122/021263.html

Thanks!

-Chris

Wow, that was fast!
I will update and check now.